Can You Help Put An Answer To These
IN A FUEL SYSTEM THE FUEL OIL HEAT EXCHANGER ALLOWS..1COOLING OF THE TURBO JET UNIT OIL OR WARMING OF THE FUEL FROM THRE TANKS BY HEAT EXCHANGER..2FUEL COOLING TO PREVENT FORMATION OF VAPOURS WHICH MAY UNPRIMED THE BURNER NOZZLE..3FUEL WARMING UP AS REQUIRED ON DETECTION OF FUEL FILTER CLOGGING..4AUTOMATIC WARMING OF THE TURBO JET UNTIL OIL BY HEAT EXCHANGE WITH THE FUEL IN ORDER TO PREVENT OIL FILTER ICING
IF IN A PRESSURISED CABIN SYSTEM THE DIFF PRESSURE HAS STABILIZED ABOVE NORMAL WORKING PRESSURE THEN,,1THE A/C IS AT AN ALT BELLOW SEA LEVEL..2PRESSURE CONTROLER FAULTY..3OUT FLOW VALVES STUCK FULLY OPEN..4MAX DIFFERENTIAL HAS BEEN EXEEDED.
THANKS TO YOU ALL IF YOU CAN HELP